Combined blow-off and hose connection for tires.



S COMBINED BLOW-OFF ND HOSE CONNECTION FOR TIRES.

APPLICATION FILED AUG.3, ISI-8.

`rpanted' Apr.' 1, 1919.

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COMINED BLowoFF AND HOSE co'NNEcnoN FOR mis.

APPLICATION FILED AUG.3, I9I8.

Patented Apr 1,1919.

3 SHEETS-SHEET 2.

III/PE?? TOR VORNE YS S. KAHN.

COMBINED BLOW-OFFVAND HOSE CONNECTION FOR TIRES.

. APPLICATION FlLED AuG.a. 1918.

l pgggg@ 1 Patented Apr; 1,1910.

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A tainers.

Errori SAMUEL kann, or NEWARK, NEW JEEsEY.

COMBINED ELow-orr AND HosE ooimEo'iIoN EOE TIRES.

Specification of Letters Patent.

Patented api-gi, tere.

Application area August a, 191s. serial No. 245,122.

T 0 all whom may concern;

Be itknoWn thatyI, SAMUEL KAHN, a citizen of "the United States, and a resident of Newark, "in the county of Essex and State of. New Jersey, have invented a new and Improved Combined Blow-Ott` and Hose Connection for Tires, of which the follow-A ing is a full, clear, and exact description; This, inventionV relates to pneumatic tire apparatus and has special 'reference to auto-v hose connectionof suitable design for permanent attachmentto -a flexible hose connected to a .compressed air reservoir or other source from Which compressed air may be delivered into .pneumatic tires or other con- Another object of the invention is to provide a combined attachment including an automatic` bloWJo' or releasing valve adapted 4to become eiiective at a predetermined relatively Vlow pressure, means being4 provided to yattach the device to sure, and the device having also means nora source o"V compressed air under relatively higher presadapts itself to prevent leakage at any pressure from the source of supply, such leak preventing means, therefore, being automatically opened When the connection isapplied to .the receiver.u

With the foregoing and other objects in v lew the invention consists in the arrange'- ment--arid combination of parts hereinafter described and claimed, and while'the invention is not restrictedto the exact details of construction disclosed or still for the. purpose of tical embodiment `thereof referenceis had to the accompanying drawings, in which like 'reference characters designate the same parts 1n the'several views, andin Which- Figure l-is a vertical longitudinal section .suggested herein,

.of one form of my improved device, the

parts beingin 'the position that they are caused to assume preparatory to attachment of the dev iceto the tire or receiver.

1g. 2 isa horizontal section on the line 2-2 of Fig. l. i

` Fig. 3 is a view similar in part to Fig. l,

'but showing the change of position of"cer m-ally preventing'the force of the higher-- pressure from prematurely operating the automatic air releasing device.

Another object of the invention is to improve the facilities for making an easy connection between the combined attachment andV a tire nipple.

A still further object ofthe invention is to provide a compressed'air hose connection for a pneumatic tibre or other container to be charged with air or gas at a predetermined degree `of compression, said connection being of or be automatically disconnected from the container when the desired degree of pressure is attained in the tire or other container.

Again, an object is to provide aconnec tion between a pneumatic tire or other receptacle Ito be charged and a source of air or gas pressure, ofsuch a nature that whenthe connection is automatically disconnected .from the receiver at a predetermined pressuch a nature as to lblow ofi?` tain of the parts incident thereof to the tire nipple.

Fig. i is a horizont-al sectional detail on the line 4% of Fig. l.l

Fig. 5 is a longitudinal sectional detail of a modified form of the invention.

Fig. 6 is a Vcentral sectional view of a further modification, parts being clutched to the tire nipple as in Figg; and

Fig. 7 is a view similar to the lower portion of -F ig. 6, but with the clutch released ready for the connection to blow oil of the tire nipple.

In the'best automobile practice it is deto the attachment siralole if not essential for the tires to be charged and kept charged at a substantially uniform pressure the degree of which may be determined by the character or quality of the tires, the load to he carried, or the Weather or other conditions. in other Words it is dangerous or injuriousto the tires for them to he either over-charged or under charged. The demand, therefore, at present `charged at a predetermined illustrating aupracor less specifically in this desci'iptionto the inflation of. automobile tires l wish it to be understood that my improvement is` adapted for a much wider range of usefulness, and therefore 1 do not wish to be limitedin the interpretation of the claims rto any speorA the like, not shown,

j source of compressed air of any well knowncific art. l

Referring now more specifically tothe nature. ,ln-the bore 11 of this nipple is fit-n te'dl a quill 12 surrounding which and in an enlargement 13 of the nipple struct-ure is a coil spring 14 of known or deternlinable strength.A One end of the spring'bears against a 'blow-off v bears a 0Vainst The circular edge y against which the cavity valve 15 while 'the other end of the spring a pin 16. The valve 15 and pin 16 are both slidable upon the'quill, the former being held normally against the 'blow-oftl valve seat 17 'andthe latter lbeing held vby virtue of the springagainst the spiral edge 18 of a graduated collar 19 adapted to be moved circumferentially aroundv the body of th'e nipple tov determine the degreaof internal pressure that would bene'cessary to unseat the blow-off valve. of-the collar 19 bears' against a .lock nut 20, the adjustment of which along the threaded portion 21 ofthe re collar, .The adjustmentof this lock nut is usually performed in the factory and'is made permanent by any .suitable means so as to prevent the disturbance `of the adjustnient. The-pin 16 projects radially from the quilloutward through a slot 22 yformed through the side `wall of the nipple body in 13 is formed.

he 'base of the valve' seat 17 is fitted against a. gasket 23 in a, valve lhead 24, and the adjacent end of the uill .12 "is fitted a washer 25 in the ase ofthe valve The ports 26, therefore, vleading seat.

Athrough the valve seat to the blow-off valve are never in Ydirect communication with the central bore 27 through the quill, valve seat, and head. The nipple body is .seated in the head against a washer 28 and is locked in such position by means of a flanged thimble 29 having threaded engagement in theliead at 3 0. Between the valve'seat 17'- and the portion ofthe head surrounding the gasket 23 is provided an annular chamber 31.

The head 24 has an. extension- 32 screw threaded into the side of a valve body 33 having a. central cavity 34. The upper `end of the body 33is closed by 35 screwed in at 36.

Opposite the plug 35 is a tubular shank 37 screwv threaded at 38 into'the body and formed in the opposite end' 'pple serves to establish the accuracy and` iability of the-.graduation marks on the means of a plug Lacasse having acheck valve seat 39 formed atl its `iipper enda with the Valveseat 39 and has a stem 41 projectingdownward loosely` through the` bore 42 'ofthe shank for cooperation with A. check yvalve 40 cooperates the tire valve mechanism lfor the 'unseatiiig i blow-off valve into dirll"he lower end'of the shank -37 isjprovided 45 lacting somewhat in the nature of a piston withan outwardly projecting flange .in a surrounding cylinder 46 whose upper endis spaced from the main portion of the shank, but provided with a flange 47 which projects inward outer wall of the shank. In this space between the` flanges 45 and 47 and ing the shank is a strongexpansion spring into loose contact with theA surround 48, the normal tendency of which is to separate the two flanges or cause the cylinder to be forced upward toward the body 33.

Fitted in the lowerend of the cylinder is a rubber thimble 49, the same *being held Vplace by means of -a cap. 50 fitted upon the lower end ofthe cylinder. This thimble 49 constitutes one of the principal features'of an automatic clutch for holding the attachment directly upon the nipple 43. The .thimble 49 by its resiliency tends to assume the forni shown in Fig. 1 filling the space lengthwise between the vcap 50 .and the pis- 'ton 45. The internal freev diameter of the thimble in this form is large enough to j ust clear the threads on the nipple 43. When, however, the piston 45 is forced downward by an suitable means toward the cap 50 the thimble 49 is expanded toward the axis l of the nipple 43 and so effectively grips upon said threads. (See Figj.)

' The best means of which I ani aware at present for controlling this action of the clutch 49 isa. lever or actuator 51 comprisiiti ing a collar 52 surrounding the shank37 and having an integral lever or finger piece 53. The cam collar 52 is provided with a the lower portion of the body 33. These lugs 55. of the shank, and between the 54 are arranged a like number of depressions into which the lugs 55 `project loosely'v are equally spaced around the axis several lifts when the lever 53 is turned through an angle ,of GOdeg'rees in the clutching position of the attachment.- As will 'be noted in Fig. 3 a clearance 56 is observed for the purpose of insuring complete action of the spring 4S in the setting `of the clutch thimble upon the nipple 43. lhen the device is to be attaclied to the nipple the operator turns the lever 53 into the Langste position indicated in F igs.

l and 4, thereby compressing the spring and -relieving the tension on the rubber thimble.

After the device' is thus adjusted and slipped v.upon the nippler the operator turns the lever through a slight angle in either direction or4 as indicated 1n dotted lines in Fig. 4, corresponding to the position of Fig. 3, setting the spring free toY effect the*grip of the clutch thimble 49 upon the nipple.

. lCoincidentally with` the application of the attachmentrto the nipple as just described the check valve 40 is unsea'tedby the coperation between the inner end of the stem 4l and the usual check valve 'stem 57. Hence the'compressed air will lthus be admitted directly through the ports 1.1 and '27 and pass the check valvev 40 into the tire orotherA receivengi, The portl 27 is not so large but that allfthe air' fiow readily into the receiver until the desircdv pressure is reachedl in the tire Vor receiver. By virtue of the drill hole 44 the air in the device, the pressurel of which is uniform throughout from the port 27 around to the annular chamber 31 will ,unseat the blow-off valvefl, the hissing of which will l indicate to the operator'tliat the desired pressure is reached in the tire. The device 1s then removed from the tire and .immedi- Y close underately the checkvalve 40 will the pressure from the source ofrsupply and no further leakage can take place therefrom. It will be understood that the pressure point at which the blow-off valve 15 becomes automatically effective will be determined by the rotation of' the cam collar 19 around the nipple.' this collar being `graduated ordinarily lfrom 50 to 90 pounds.'- The device thus far described is simple and certainin operation and not being likely to get out of order is well adapted foi-.the rough 4usage to whichfit is likely to be subjected in every day practice.

By way of' slight variation from that .form of the device already described in detail in Fig. `4 I am able to make an attachment ofjsuch a nature as to be automatically blown offs-or disconnected from 'the tire nipple 43 at the moment the desired definite pressure in the tire is reached, As the body 33 is the same as above described having secured thereto the shank 37 around which is mounted a cam member cooperating on one side with the vlugs and on the other side with a cylinder 4G. iVithin this cylinder is housed the fixed expansion spring 48 bearing -at one end against the flange or pistou 45 and at the other end against an adjustable flange or nut 47 having slidable engagement along the shank 37. but held from rotation thereon by means nally threaded for vthis nut47, and on the .virtue of the spring passing therethrough will isblown on? automatically by the internal outside olthe cylinder is arranged a. scale S having graduation marksto indicat'ehe possible variations of pressure similar to those on the. collar 19 above described and a pointer 60 on any' relatively stationary member such as on the body 33vis adapted to indicate the pressure determined by the rotation of the cylinder around theV sha-nk and nut whereby the nut is run up or down along the screw threads varying the tension of the spring accordingly. The manner of y applying the attachment to thenipple 43 is the same as has already been described, the clutchthimble 49 being adapted to automatically grip upon the threaded nipple by 48 when the actuator 5l turned to the position shown in Fig. This spring 48 is so designed in vconnection with the piston-like action of the flange 45 that when the desired pressure is reached within the tire or container, the spring will be compressed allowing the thimble 49 to elongate and release its hold upon; the nipple and thon immediately the entire attachment pressure.

In Figs. 5 and 6 I show a further modilication in which the adjustable means coin sist-s of'a collar 19 acting against 'he pin 16 associated with an elongated body 33 which partalkes of some of the characteristics ot' the shank 37 in that `its upper end constitutes the seat 39 for a check valve-40 hav ing ai stem 4l leading all the way down to the standard check vvalve stem 57 within 100 the tire nipple 43. The lugs are carried by the outwardly projecting flange (3l of the body 33 and they coperate with an actuator 5l in the same manner as already dc'- scribed.

The main expansion spring 48 is housed within the cylinder 46 and operates as already described for the purpose of automatically compressingthe clutch thimble 49a.

In thisl form, however, the thimble is sui- U0 rounded by meansof a` metal thimble 42)? having an inwardly projecting frusto-conical flange 49C having one or more notches (32 at its upper edge adjacent to the piston flange 45. l2 indicates a` quill fitted at its upper 115 end in the upper portion of the body 43 and constituting a guide for the pin 16 and the adjustable spring 14. The lower end of this spring bears in a. metal ring G3 supported upon a flexible fianged washer 64 which seats 120 directly upon the upper edge ofthe nipple 43 when the attachment is applied thereto as in Fig. 6. This washer 64 has air tight fit upon the lower end of the quill 12 and its outer flange bears against the bottom of' the 125 piston flange-,45a whereby premature leakage of air out through the body and slot 22 is prevented Upon the adjustment of the collar 19 to control'the prcssure'at which the device Vwill blow olf and the application washer 64t sufiiciently to allow the clutch thimble, substantially as' set bed hosey connection4 thimble within surrounding lthese forms aswell as. that the check valvexl() will, immediately close u of the attachment to the nipple as shown in Fig. 6, the standard check valve within the tire will be opened the stem and the 'air underpressure will be admitted. in the tire until the-degree of pressure is reached therein for which the device is set. At-this will iift the moment the internal pressure air to pass the washer 'and the along the spacebetween Vmetal thimble 49 fillingthe entire space beneath the piston flange By reason, therefore, -of the increased area ofthe surface upon which the pressure `is caused to`act the more powerful spring 48 will be compressed as shown in Fig. 7 and thus the compression Vof the thimble a9 is relieved and thedevlice immediately blows off of the nipple. In' first described,

and prevent loss 'of agir through' the tube nipplelO.'

' fl. In a'combinedblowofi hose connection for tires, a ,tubular member having anout-l wardly projecting piston flange, a cylinder embracing the member, an expansion spring surrounding the embraced portion of the tubular`member and actin flange an of the cylinder,

at its other end against ai portion structure,A a clutch thimble within the cylinder and adapted when com' between said .lugs and cylinder to cause the adapted to connect with flanged portion of thetubular detach, said ldevice at one end against said pistony a plurality of lugs ceiVe-r, andmeans automatically detach said device from'the nipple, said .last-mentioned means being subject to apredetermined pressure developed in megane clutchthimble to operate in the other direc.

tion. i

l 3. ln a device` of the character set forth, a tubularmember, an outwardly projecting flange on the lower end `tubular member and having a flange projecting inward, an expansion spring housed be tween the member and the cylinder' and bethereof', a cylinder slidably. embracing tlie .flanged end of the tween said flanges and tending Yto tellescope the member and cylinder, a fienible clutch thimble carried within the cylinder beyond the telescoping actionaforesaid, and a finger pice acting between thetubular member and the cylinder serving to comp theext'ension of"` the ,clutch trhimble, said "finger piece comprising a cam collar mont- 'ed 'upon the tubular member andvmovable around the axis thereof.

- 4. In a .device of the character described a receiver to direct a fluid theretd underpressure, the'combination of anipple clutch having "a flexible sleeve' to leffect the clutching action and means to automatically release the clutch to from the nipple at` any predetermined pressure in the receiver.

In adevice of the class*described,` a 4nipple clutch havinofa flexible sleeve constituting the 'clutc iing eiem'ent, springress said Sprincr and permit the first mentioned flange and. 'adapted tobe compressed by pressed means normally tending to compress the clutch toeffect the clutching engagement, Vand means to relieve thesleeve ofthe spring lpressure to 'release the clutch.

-6. LA levice of the class described adapted to comiectwith a receiver .to direct a Huid ,thereto under pressure, the combination of clutch means adapted to effect 'clutching en-J gagement with the inlet nipple of the re to release said clutch and the receiver.

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